INVITE name:user SIP/2.0 To: sip:user@company.com From: sip:caller@university.edu Call-ID: 6@10.0.0.1 CSeq: 1 INVITE Via: SIP/2.0/UDP 135.180.130.133 Content-Type: application/sdp Content-Length: 174 v=0 o=mhandley 29739 7272939 IN IP4 126.5.4.3 s=SIP Call c=IN IP4 135.180.130.88 t=3149328700 0 m=audio 49210 RTP/AVP 0 12 m=video 3227 RTP/AVP 31 a=rtpmap:31 LPC/8000